JP7419686B2 - Electronic devices, management systems, and display methods - Google Patents

Description

The present invention relates to an electronic device, a management system, and a display method.

In recent years, electronic devices using RFID (Radio Frequency Identification) have been widely used (see, for example, Patent Document 1). In addition, some electronic devices such as electronic paper are known to be capable of displaying three or more colors, such as red and yellow, in addition to two-color display (black and white). ing.

JP2017-215837A

By the way, in the electronic device described above, when displaying characters or images on the display section, for example, in response to a display request from a host device, pre-stored image data is read out and displayed on the display section. However, in the above-mentioned electronic devices, when supporting display of three or more colors, the amount of image data to be stored in advance increases, so a large-capacity storage unit is required to store the image data. , the images that could be displayed were sometimes limited.

The present invention has been made to solve the above problems, and its purpose is to provide an electronic device, a management system, and a management system capable of reducing the amount of information for storing image data and reducing restrictions on images that can be displayed. and to provide a display method.

In order to solve the above problem, one embodiment of the present invention includes a display portion that has non-volatile memory and displays a plurality of colors of three or more, and a display portion that can display on the display portion, and that allows one pixel to be displayed in two colors. an image storage unit that stores image data expressed as value information; a wireless communication unit that communicates with a host device through wireless communication; and a display request that the wireless communication unit receives from the host device through the wireless communication. image designation information specifying the image data stored in the image storage unit, color information indicating a color corresponding to the binary information , the number of images, and a position at which the image is displayed on the display unit. In response to a display request including display position information , the image data designated based on the image designation information is acquired from the image storage unit, and the acquired image data is colored based on the color information, a processing unit that displays on the display unit, the display request includes layer information indicating a layer to be displayed with priority in the display of the display unit, and the processing unit The electronic device is characterized in that the image data is displayed in the hierarchical layer in a color based on the color information.

Further, one aspect of the present invention is arranged with the electronic device described above for each step, and when the electronic device passes through the step, transmits the display request to change the display of the display unit to the display unit. This management system is characterized by comprising a plurality of reader/writer devices, which are the above-mentioned higher-level devices, and which are changed according to the process.

Further, one aspect of the present invention provides a display unit that has a non-volatile memory property and displays a plurality of colors of three or more colors, and an image that can be displayed on the display unit and that represents one pixel as binary information. A display method for an electronic device comprising an image storage section that stores data, and a wireless communication section that communicates with a host device via wireless communication, the wireless communication section communicating with the host device via wireless communication. The received display request includes image specification information specifying the image data stored in the image storage unit, color information indicating a color corresponding to the binary information , the number of images, and displaying the image data on the display unit. a receiving step of receiving a display request including display position information indicating a position to be displayed from the higher-level device via the wireless communication; and a processing unit, in response to the display request received by the receiving step, the display request includes a processing step of acquiring the image data specified based on the information from the image storage unit and displaying the acquired image data on the display unit in a color based on the color information; , including layer information indicating a layer to be displayed with priority in the display on the display section, and in the processing step, the processing section adds a color based on the color information to the layer according to the layer information on the display section. This display method is characterized in that the image data is displayed in the following manner.

According to the present invention, it is possible to reduce the amount of information for storing image data and reduce restrictions on images that can be displayed.

FIG. 1 is a block diagram illustrating an example of an electronic device according to a first embodiment. FIG. 3 is a diagram showing an example of data in an image storage unit in the first embodiment. FIG. 3 is a diagram showing an example of color information data in the first embodiment. 5 is a flowchart illustrating an example of display command processing of the electronic device according to the first embodiment. FIG. 3 is a first diagram illustrating an example of display processing on a display unit in the first embodiment. 6 is a diagram illustrating an example of display on a display unit according to an example of the display process illustrated in FIG. 5. FIG. FIG. 7 is a second diagram illustrating an example of display processing on the display unit in the first embodiment. 8 is a diagram illustrating an example of display on a display unit according to an example of the display process illustrated in FIG. 7. FIG. FIG. 2 is a block diagram illustrating an example of an electronic device according to a second embodiment. It is a figure which shows the data example of layer information in 2nd Embodiment. 7 is a flowchart illustrating an example of display command processing of an electronic device according to the second embodiment. FIG. 7 is a diagram illustrating an example of display processing on a display unit in the second embodiment. FIG. 3 is a block diagram showing an example of a production management system according to a third embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, an electronic device, a management system, and a display method according to one embodiment of the present invention will be described with reference to the drawings.

[First embodiment]
FIG. 1 is a block diagram showing an example of an electronic device 1 according to this embodiment.
As shown in FIG. 1, the electronic device 1 includes a wireless communication section 11, a display section 12, a storage section 13, and a control section 14.

The electronic device 1 is, for example, an electronic device such as an RFID tag, a contactless IC card, or an edge device. Executes processing (command processing) according to the received command. Then, the electronic device 1 transmits (reply) a response (processing response) that is the execution result of the command processing to the reader/writer 2 via the wireless communication unit 11.

The reader/writer 2 is an example of a host device, includes a wireless communication unit (not shown), transmits commands through wireless communication, and causes the electronic device 1 to execute processing according to the commands. For example, the reader/writer 2 transmits a display command to the electronic device 1 and causes the display unit 12 of the electronic device 1 to display various images.

The wireless communication unit 11 communicates with the reader/writer 2 (upper-level device) by wireless communication such as NFC (Near Field Communication), for example. The wireless communication unit 11 receives various commands from the reader/writer 2 via wireless communication, and outputs the received commands to the control unit 14, which will be described later. The wireless communication unit 11 also transmits responses to various command processes processed by the control unit 14 to the reader/writer 2 via wireless communication. Note that the wireless communication unit 11 may receive power for operating the electronic device 1 from the reader/writer 2 by wireless power supply.

The display unit 12 is, for example, electronic paper, and performs display with non-volatile memory properties. The display unit 12 can display colors such as red and yellow in addition to black and white, for example. That is, the display unit 12 is electronic paper that supports display of three or more colors. Note that the display unit 12 includes a driver unit (not shown) that writes display data such as characters and images on electronic paper, and a display panel (not shown).

The storage unit 13 stores various information used by the electronic device 1. The storage unit 13 includes, for example, an image storage unit 131.
The image storage unit 131 is configured with a nonvolatile memory such as an EEPROM (Electrically Erasable Programmable Read-Only Memory), and stores image data that can be displayed on the display unit 12 in advance. Note that the image data represents one pixel (one dot) as binary information (for example, one bit of information). Here, with reference to FIG. 2, an example of data in the image storage unit 131 in this embodiment will be described.

FIG. 2 is a diagram showing an example of data in the image storage unit 131 in this embodiment.
As shown in FIG. 2, the image storage unit 131 stores in advance "image identification information,""sizeinformation," and "image data" in association with each other. Here, the "image identification information" indicates an image ID in hexadecimal numbers (hexadecimal) that identifies the image, and the "size information" indicates the "horizontal size" and "vertical size" of the image. Moreover, "image data" is image data that can be displayed on the display unit 12, and indicates image data in which one pixel (one dot) is expressed as binary information of "0" or "1", for example. There is.

For example, in the example shown in FIG. 2, the "size information" of the image whose "image identification information" corresponds to "01" has a "horizontal size" of "288" dots and a "vertical size" of "48" dots. It shows that. It also shows that "image data of image A" is stored in the image storage unit 131 as "image data" whose "image identification information" corresponds to "01".

Returning to the description of FIG. 1, the control unit 14 is a processor including, for example, a CPU (Central Processing Unit), and controls the electronic device 1 in an integrated manner. The control unit 14 includes a command processing unit 141 and a display control unit 142.

The command processing unit 141 (an example of a processing unit) acquires the command (processing request) that the wireless communication unit 11 receives from the reader/writer 2 via wireless communication, and executes various command processes according to the command. Further, the command processing unit 141 causes the wireless communication unit 11 to transmit (reply) a response (processing response) that is the execution result of the command processing to the reader/writer 2 .

For example, when the wireless communication unit 11 receives a display command (display request) from the reader/writer 2 via wireless communication, the command processing unit 141 executes command processing to cause the display unit 12 to display a designated image. Here, the display command includes display position information indicating the display position on the display unit 12, and the above-mentioned image designation information and color information.

The color information is information indicating a color corresponding to the binary information representing one pixel (one dot) described above, and is information specifying the type of display color. It is assumed that the color information is set in advance as shown in FIG. 3, for example.

FIG. 3 is a diagram showing an example of color information data in this embodiment.
As shown in Figure 3, "color information" and "display color" are associated in advance. For example, when "color information" is "0x0", "black and white" is set for "display color". Indicates that it will be specified. Further, when the "color information" is "0x1", it indicates that "white red" is specified as the "display color". Here, a character string with "0x" added to the beginning indicates a hexadecimal notation. Furthermore, here, "color information" is expressed as 4-bit information.

Returning to the explanation of FIG. 1 again, when the command processing unit 141 receives a display command including display position information, image designation information, and color information, the command processing unit 141 first performs processing based on the image designation information in accordance with the display command. The designated image data is acquired from the image storage section 131. That is, the command processing unit 141 searches the image storage unit 131 for image data corresponding to the received image designation information, and reads out the image data corresponding to the image designation information. For example, when the image designation information is “0x01”, the command processing unit 141 reads the size information and image data of the image A from the image storage unit 131.

Further, the command processing unit 141 causes the display unit 12 to display the acquired image data in a color based on the color information. For example, the command processing unit 141 determines a display color corresponding to the color information based on the predetermined settings shown in FIG. , the image data acquired from the image storage unit 131 is displayed.

For example, when the color information is "0x0", the command processing section 141 sets the display color to "black and white" and displays the image data acquired from the image storage section 131 on the display section corresponding to the received display position information. The display control unit 142 is requested to display the image at the position shown in FIG.

The display control section 142 controls the display on the display section 12. For example, based on a request from the command processing unit 141, the display control unit 142 converts the image data supplied from the command processing unit 141 into a specified display color (for example, black and white, white and red, etc.) from a specified display start position. ).
In the present embodiment, the display control unit 142 gives priority to displaying an image corresponding to a later display request (display command) at a location where the display positions of the image data overlap.

Next, the operation of the electronic device 1 according to this embodiment will be described with reference to the drawings.
FIG. 4 is a flowchart illustrating an example of display command processing of the electronic device 1 according to the present embodiment.

As shown in FIG. 4, the electronic device 1 first determines whether a command has been received (step S101). That is, the control unit 14 of the electronic device 1 determines whether the wireless communication unit 11 has received a command from the reader/writer 2. When the wireless communication unit 11 receives the command (step S101: YES), the control unit 14 advances the process to step S102. Further, if the wireless communication unit 11 has not received the command (step S101: NO), the control unit 14 returns the process to step S101.

Note that when a command is received here, it is assumed that all the message data of each command is received by receiving the message once or by receiving the message multiple times by chaining.
In addition, the display command can specify and display multiple images in one command process, and the message of the display command includes the display command code, the number of images, and information about each image (display position information, (image designation information and color information) and display command end information.

In step S102, the command processing unit 141 of the control unit 14 determines whether the command received from the reader/writer 2 is a display command. If the command received from the reader/writer 2 is a display command (step S102: YES), the command processing unit 141 advances the process to step S103. Further, if the command received from the reader/writer 2 is not a display command (a command other than a display command) (step S102: NO), the command processing unit 141 advances the process to step S110.

In step S103, the command processing unit 141 sets the image count value n to "1".
Next, the command processing unit 141 reads the image data specified by the image specification information from the image storage unit 131 (step S104). The command processing unit 141 uses the image specification information of the n-th image included in the display command as the image ID, searches the image storage unit 131 for image data corresponding to the image ID, and retrieves the image data and size information corresponding to the image ID. is read from the image storage unit 131.

Next, the command processing unit 141 generates screen data that causes the image data to be displayed at the specified position of the display unit in the color specified by the color information (step S105). The command processing unit 141 displays a display color corresponding to the color information of the n-th image included in the display command (for example, see FIG. 3) at a display position based on the display posthumous information of the n-th image included in the display command. ), screen data for the display unit 12 is generated so as to display image data of the size indicated by the size information read from the image storage unit 131.

Next, the command processing unit 141 adds "1" to the count value n (step S106). That is, the command processing unit 141 sets the image count value n to the value (n+1).

Next, the command processing unit 141 determines whether the count value n is greater than the number of images included in the display command (step S107). If the count value n is greater than the number of images (step S107: YES), the command processing unit 141 advances the process to step S108. Further, when the count value n is less than or equal to the number of images (step S107: NO), the command processing unit 141 returns the process to step S104 and repeats the processes from step S104 to step S107.

In step S108, the command processing unit 141 displays the generated screen data on the display unit 12. That is, the display control unit 142 is requested to display the generated screen data on the display unit 12, and in response to this request, the display control unit 142 causes the display unit 12 to display the image data specified by the display command. Display the display screen that includes. As a result, the image data specified by the display command is displayed on the display unit 12 in the specified color.

Next, the command processing unit 141 transmits a response (step S109). The command processing unit 141 transmits a response corresponding to various command processing to the reader/writer 2 via the wireless communication unit 11 as a result of the command processing. After the process in step S109, the control unit 14 returns the process to step S101.

Further, in step S110, the command processing unit 141 executes other command processing (command processing other than the display command). After the processing in step S110, the command processing unit 141 advances the processing to step S109 and transmits a response as a result of other command processing.

Next, display processing on the display unit 12 in this embodiment will be described with reference to FIGS. 5 to 8.
FIG. 5 is a first diagram showing an example of display processing on the display unit 12 in this embodiment. Further, FIG. 6 is a diagram showing an example of display on the display unit 12 by an example of the display processing shown in FIG. 5.
In FIG. 5, an example in which images SG1 to SG4 shown in FIG. 6 are displayed on the display section 12 will be described. Note that here, an example will be described in which a display command is transmitted by dividing it into four messages using an R (ACK) block message (acknowledge message).

As shown in FIG. 5, the reader/writer 2 first sends a divided message of a display command that includes a display command code, the number of images, and information about image A (display position information, image designation information for image A, and color information (0x0)). is transmitted to the electronic device 1 (step S201). Note that in this example, the number of images is "4".
Next, the electronic device 1 transmits R (ACK) for the message in step S201 to the reader/writer 2 (step S202).

Next, the reader/writer 2 transmits a divided message of a display command including information on image B (display position information, image designation information on image B, and color information (0x0)) to the electronic device 1 (step S203). .
Next, the electronic device 1 transmits R (ACK) for the message in step S203 to the reader/writer 2 (step S204).

Next, the reader/writer 2 transmits a divided message of a display command including information on the image C (display position information, image designation information on the image C, and color information (0x1)) to the electronic device 1 (step S205). .
Next, the electronic device 1 transmits R (ACK) for the message in step S205 to the reader/writer 2 (step S206).

Next, the reader/writer 2 sends the divided message of the display command including the information of the image D (display position information, image designation information of the image D, and color information (0x1)) and the display command end information to the electronic device 2. (step S207).

Next, the electronic device 1 displays images A and B in black and white and images C and D in white and red on the display unit 12 in accordance with the display command (step S208). Here, the electronic device 1 displays the image A in black and white at the display position of the display section 12 specified by the display position information, as shown in the image SG1 of FIG. 6, and displays the image A in black and white as shown in the image SG2 of FIG. , displays image B in black and white at the display position of the display section 12 specified by the display position information.

Further, the electronic device 1 displays the image C in white and red at the display position of the display unit 12 specified by the display position information, as shown in the image SG3 of FIG. Note that since a part of image SG3 overlaps a part of image SG1 and a part of image SG2, the display control unit 142 gives priority to image C input later in the overlapped display position. indicate. Furthermore, as shown in image SG4 in FIG. 6, electronic device 1 displays image D in white and red at the display position of display unit 12 specified by the display position information.
Next, the electronic device 1 transmits a response to the display command to the reader/writer 2 (step S209).

In this way, the electronic device 1 changes the display color in the order of image SG1 → image SG2 → image SG3 → image SG4, and displays images A to D stored in the image storage unit 131 as shown in the display screen G1. indicate.

Further, FIG. 7 is a second diagram showing an example of display processing on the display unit 12 in this embodiment. Further, FIG. 8 is a diagram showing an example of display on the display unit 12 by an example of the display processing shown in FIG. 7.
In FIG. 7, an example in which images SG5 to SG8 shown in FIG. 8 are displayed on the display unit 12 will be described. Note that the display screen G2 shown in FIG. 8 has a different display color from the display screen G1 shown in FIG. 6 described above. Also, here, as in the example shown in FIG. 5 described above, an example will be described in which a display command is transmitted by dividing it into four messages using an R (ACK) block message (acknowledge message).

As shown in FIG. 7, the reader/writer 2 first divides a display command including a display command code, the number of images, and information about image A (display position information, image designation information for image A, and color information (0x1)). The message is transmitted to the electronic device 1 (step S301). Note that in this example, the number of images is "4".
Next, the electronic device 1 transmits R (ACK) for the message in step S201 to the reader/writer 2 (step S302).

Next, the reader/writer 2 transmits a divided message of a display command including information on image B (display position information, image designation information on image B, and color information (0x1)) to the electronic device 1 (step S303). .
Next, the electronic device 1 transmits R (ACK) for the message in step S203 to the reader/writer 2 (step S304).

Next, the reader/writer 2 transmits a divided message of a display command including information on the image C (display position information, image designation information on the image C, and color information (0x0)) to the electronic device 1 (step S305). .
Next, the electronic device 1 transmits R (ACK) for the message in step S205 to the reader/writer 2 (step S306).

Next, the reader/writer 2 sends the divided message of the display command including the information of the image C (display position information, image designation information of the image D, and color information (0x0)) and the display command end information to the electronic device 2. (step S307).
Next, the electronic device 1 causes the display unit 12 to display images A and B in white and red, and images C and D in black and white, in response to the display command (step S308). Here, the electronic device 1 displays the image A in white and red at the display position of the display section 12 specified by the display position information, as shown in the image SG5 of FIG. 8, and displays the image A in white and red as shown in the image SG6 of FIG. Then, image B is displayed in white and red at the display position of the display unit 12 specified by the display position information.

Further, the electronic device 1 displays the image C in black and white at the display position of the display unit 12 specified by the display position information, as shown in the image SG7 of FIG. Note that since a part of the image SG7 overlaps a part of the image SG5 and a part of the image SG6, the display control unit 142 gives priority to the image C input later in the overlapped display position. indicate. Further, the electronic device 1 displays the image D in black and white at the display position of the display section 12 specified by the display position information, as shown in the image SG8 of FIG.
Next, the electronic device 1 transmits a response to the display command to the reader/writer 2 (step S309).

In this way, the electronic device 1 changes the display color in the order of image SG5 → image SG6 → image SG7 → image SG8, and displays images A to D stored in the image storage unit 131 as shown on the display screen G2. indicate.
Note that the electronic device 1 may include a write command for writing (registering) image data in the image storage section 131 in addition to the display command described above. That is, the command processing unit 141 writes image data that can be displayed on the display unit 12 into the image storage unit in response to a write command for writing image data that the wireless communication unit 11 receives from the reader/writer 2 via wireless communication into the image storage unit 131. 131 may be stored.
Furthermore, in the examples shown in FIGS. 5 and 7 described above, an example was explained in which the display command is divided into four parts and sent to the electronic device 1. However, if the message length of the display command is within the maximum transmission data length, the division is performed. Alternatively, the message may be sent to the electronic device 1 in one message. In addition, in the above example, the number of images is set to "4" and information on four images is transmitted using the display command. However, the number of images is set to "1" and the processing is divided into four display commands. It may also be processed by

As described above, the electronic device 1 according to the present embodiment includes the display section 12, the image storage section 131, the wireless communication section 11, and the command processing section 141 (processing section). The display unit 12 performs display having non-volatile memory properties. The image storage unit 131 can be displayed on the display unit 12 and stores image data representing one pixel as binary information. The command processing unit 141 processes a display command (display request) that the wireless communication unit 11 receives from the reader/writer 2 via wireless communication, including image specification information that specifies image data to be stored in the image storage unit 131, and binary information. In response to a display command including color information indicating a color corresponding to the color information, image data designated based on the image designation information is acquired from the image storage unit 131. The command processing unit 141 causes the display unit 12 to display the acquired image data in a color based on the color information.

As a result, the electronic device 1 according to the present embodiment stores image data representing one pixel as binary information in the image storage unit 131, and uses the display command to store the image data in the image storage unit 131 in a color corresponding to the color information. Since the image data to be stored is displayed on the display unit 12, the amount of information for storing the image data can be reduced even when displaying three or more colors, for example. Furthermore, since the electronic device 1 according to the present embodiment can store more image data in the image storage unit 131, it is possible to reduce restrictions on images that can be displayed.

For example, in the conventional technology, when displaying multiple colors of three or more colors, the image data uses two or more bits of information for one pixel (for example, 2 bits for 3 or 4 colors, 3 bits for 5 to 8 colors). It was necessary to express it as On the other hand, in the electronic device 1 according to the present embodiment, since one pixel of image data is represented as one bit of information (binary information), the amount of information of image data is reduced to 1/2 or less compared to the conventional technology. can be reduced.

Furthermore, in the electronic device 1 according to the present embodiment, when the reader/writer 2 registers the image data, the amount of information of the image data is reduced, so the amount of information for transmitting the image data to the electronic device 1 is reduced. The traffic of wireless communication by the wireless communication unit 11 can be reduced.
Further, the electronic device 1 according to the present embodiment can display various display patterns by combining image data and color information, and can perform flexible display with a high degree of freedom.

Further, the display method according to the present embodiment is a display method for the electronic device 1 described above, and includes a receiving step and a processing step. In the receiving step, the wireless communication unit 11 wirelessly transmits a display command (display request) including image designation information that designates image data stored in the image storage unit 131 and color information that indicates a color corresponding to binary information. It is received from the reader/writer 2 through communication. In the processing step, the command processing unit 141 obtains the image data specified based on the image specification information from the image storage unit 131 in response to the display command received in the receiving step, and converts the obtained image data into color information. The displayed color is displayed on the display unit 12 in the based color.
Thereby, the display method according to the present embodiment can achieve the same effects as the electronic device 1 described above, reduce the amount of information for storing image data, and reduce restrictions on images that can be displayed.

[Second embodiment]
Next, refer to the drawing. An electronic device 1a according to a second embodiment will be described.
In this embodiment, a modification will be described in which layer information is added to the display command of the first embodiment described above, and display is performed in a specified display color in a display hierarchy corresponding to the layer information.

FIG. 9 is a block diagram showing an example of the electronic device 1a according to this embodiment.
As shown in FIG. 9, the electronic device 1a includes a wireless communication section 11, a display section 12, a storage section 13, and a control section 14a.
Note that in FIG. 9, the same components as in FIG. 1 are given the same reference numerals, and their explanations will be omitted.

The control unit 14a is, for example, a processor including a CPU, and controls the electronic device 1a in an integrated manner. The control unit 14a includes a command processing unit 141a and a display control unit 142a.

The basic function of the command processing unit 141a (an example of a processing unit) is the same as that of the command processing unit 141 of the first embodiment described above, and the command processing unit 141a (an example of a processing unit) has the same basic function as the command processing unit 141 of the first embodiment described above. (processing request) and executes various command processes according to the command. Further, the command processing unit 141a causes the wireless communication unit 11 to transmit (reply) a response (processing response) that is the execution result of the command processing to the reader/writer 2.

For example, when the wireless communication unit 11 receives a display command (display request) from the reader/writer 2 via wireless communication, the command processing unit 141a executes command processing to cause the display unit 12 to display a specified image. Note that in the command processing unit 141a of this embodiment, the display command includes display position information, image designation information, color information, and layer information.

Here, the layer information is information that indicates a hierarchy to be displayed with priority in the display of the display unit 12, and indicates the hierarchy before and after (front/back) of the display when the display screen is viewed from above. It is assumed that the layer information is set in advance as shown in FIG. 10, for example.

FIG. 10 is a diagram showing a data example of layer information in this embodiment.
As shown in FIG. 10, "layer information" and "display hierarchy" are associated in advance. For example, when "layer information" is "0x0", "display hierarchy" is "layer information". This indicates that "1st layer (frontmost layer)" is specified. Further, when the "layer information" is "0x1", it indicates that the "second layer" is designated as the "display layer".

Note that in this embodiment, "layer information" is expressed as 4-bit information, and it is possible to have a hierarchy of 16 levels from 0x0 to 0xF.
Further, in this embodiment, the additional information is 1 byte of information in which the above-mentioned "layer information" is the upper 4 bits and the "color information" is the lower 4 bits.

Returning to the explanation of FIG. 9 again, when the command processing unit 141a receives a display command including display position information, image designation information, color information, and layer information, the command processing unit 141a first processes the image designation information in accordance with the display command. The specified image data is acquired from the image storage unit 131 based on the specified image data. Further, the command processing unit 141a displays the acquired image data in a color based on the color information and in a hierarchy according to the layer information on the display unit 12.

For example, the command processing unit 141a determines the display color corresponding to the color information based on the settings predetermined in FIG. 3, and also determines the display color corresponding to the layer information based on the settings predetermined in FIG. Determine. The command processing unit 141a displays the image data acquired from the image storage unit 131 in the display color and at a position on the display unit 12 that corresponds to the display position information of the hierarchy.
For example, when the layer information is "0x0", the command processing unit 141a may display the image data acquired from the image storage unit 131 with the display layer set to the "first layer (frontmost layer)". A request is made to the display control unit 142a.

The display control section 142a controls the display on the display section 12. For example, based on a request from the command processing unit 141a, the display control unit 142a converts the image data supplied from the command processing unit 141a into a specified display color (for example, black and white, white and red, etc.) from a specified display start position. ) and in the specified display hierarchy (for example, the first hierarchy (front), the second hierarchy (back), etc.).

Next, the operation of the electronic device 1a according to this embodiment will be described with reference to the drawings.
FIG. 11 is a flowchart illustrating an example of display command processing of the electronic device 1a according to the present embodiment.

In FIG. 11, the processing from step S401 to step S404 is the same as the processing from step S101 to step S104 shown in FIG. 4 described above, so the description thereof will be omitted here.
Note that in step S402, if the command received from the reader/writer 2 is not a display command (a command other than a display command) (step S402: NO), the command processing unit 141a advances the process to step S410.

Further, in step S405, the command processing unit 141a generates screen data for displaying the image data at the specified position on the display unit 12, in the color specified by the color information, and in the hierarchy specified by the layer information. . The command processing unit 141a sets the display position based on the display posthumous information included in the display command in a display color corresponding to the color information included in the display command (for example, see FIG. 3) and in a layer corresponding to the layer information. (see, for example, FIG. 10), screen data for the display unit 12 is generated so as to display image data of the size indicated by the size information read from the image storage unit 131.

Next, the command processing unit 141a adds "1" to the count value n (step S406). That is, the command processing unit 141a sets the image count value n to the value (n+1).

Next, the command processing unit 141a determines whether the count value n is greater than the number of images included in the display command (step S407). If the count value n is greater than the number of images (step S407: YES), the command processing unit 141a advances the process to step S108. Further, when the count value n is less than or equal to the number of images (step S407: NO), the command processing unit 141a returns the process to step S404 and repeats the processes from step S404 to step S407.

In step S408, the command processing unit 141a displays the generated screen data on the display unit 12. That is, the display control unit 142 is requested to display the generated screen data on the display unit 12, and in response to this request, the display control unit 142 causes the display unit 12 to display the image data specified by the display command. Display the display screen that includes. As a result, the image data specified by the display command is displayed on the display unit 12 in the specified color and display hierarchy.

Next, the command processing unit 141a transmits a response (step S409). The command processing unit 141a transmits responses according to various command processes to the reader/writer 2 via the wireless communication unit 11 as a result of command processing. After the process in step S409, the control unit 14a returns the process to step S401.

Further, in step S410, the command processing unit 141a executes other command processing (command processing other than the display command). After the processing in step S410, the command processing unit 141a advances the processing to step S409 and transmits a response as a result of other command processing.

Next, with reference to FIG. 12, display processing on the display unit 12 in this embodiment will be described.
FIG. 12 is a diagram showing an example of display processing on the display unit 12 in this embodiment. In addition, in FIG. 12, an example in which images SG1 to SG4 shown in FIG. 6 described above are displayed on the display section 12 will be described. Also, similar to the examples shown in FIGS. 5 and 7 described above, here, an example is shown in which the display command is sent divided into four messages using the R (ACK) block message (acknowledge message). explain.

As shown in FIG. 12, the reader/writer 2 first divides a display command including a display command code, the number of images, and information about image A (display position information, image designation information for image A, and color information (0x1)). The message is transmitted to the electronic device 1a (step S501). Note that in this example, the number of images is "4".
Next, the electronic device 1a transmits R (ACK) for the message in step S501 to the reader/writer 2 (step S502).

Next, the reader/writer 2 transmits a divided message of a display command including information on the image C (display position information, image designation information on the image C, and additional information (0x01)) to the electronic device 1a (step S503). . Here, the additional information (0x01) corresponds to color information (0x1) and layer information (0x0).
Next, the electronic device 1a transmits R (ACK) for the message in step S503 to the reader/writer 2 (step S504).

Next, the reader/writer 2 transmits a divided message of a display command including information on image B (display position information, image designation information on image B, and additional information (0x10)) to the electronic device 1a (step S505). . Here, the additional information (0x10) corresponds to color information (0x0) and layer information (0x1).
Next, the electronic device 1a transmits R (ACK) for the message in step S505 to the reader/writer 2 (step S506).

Next, the reader/writer 2 sends the divided message of the display command including the information of the image D (display position information, image designation information of the image D, and additional information (0x01)) and the display command end information to the electronic device 1a. (step S507). Here, the additional information (0x01) corresponds to color information (0x1) and layer information (0x0).

Next, in response to the display command, the electronic device 1a causes the display unit 12 to display images A and B in black and white and on the second layer, and images C and D in white and red on the first layer ( Step S508). Here, the electronic device 1a displays the image A in black and white and in the second layer at the display position of the display section 12 specified by the display position information, as shown in the image SG1 in FIG. As shown in SG3, the image C is displayed in white and red in the first layer at the display position of the display unit 12 specified by the display position information. Note that the display control unit 142a displays the image C with priority, and displays the image SG3 in front of the image SG1.

Further, as shown in image SG2 in FIG. 6, the electronic device 1a displays the image B in black and white and in the second layer at the display position of the display section 12 specified by the display position information. Here, the display control unit 142a displays image B (image SG2) on the back side (second layer) of image SG3. Furthermore, as shown in image SG4 in FIG. 6, the electronic device 1a displays the image D in white and red in the first layer at the display position of the display section 12 specified by the display position information.
Next, the electronic device 1a transmits a response to the display command to the reader/writer 2 (step S509).

In this way, the electronic device 1a changes the display color and display hierarchy in the order of image SG1 → image SG3 → image SG2 → image SG4, and as shown in display screen G1, image A stored in image storage unit 131 is displayed. ~Display image D.

As described above, the electronic device 1a according to the present embodiment includes the display section 12, the image storage section 131, the wireless communication section 11, and the command processing section 141a (processing section). The command processing unit 141a processes a display command (display request) received by the wireless communication unit 11 from the reader/writer 2 via wireless communication, and includes image specification information specifying image data to be stored in the image storage unit 131, and binary information. In response to a display command including color information indicating a color corresponding to the color information, image data designated based on the image designation information is acquired from the image storage unit 131. The command processing unit 141a causes the display unit 12 to display the acquired image data in a color based on the color information.
As a result, the electronic device 1a according to the present embodiment achieves the same effects as the first embodiment described above, reduces the amount of information for storing image data, and reduces restrictions on images that can be displayed. can.

Further, in the present embodiment, the display command includes layer information indicating a hierarchy to be displayed with priority in the display on the display unit 12. The command processing unit 141a displays the image data in a hierarchy according to the layer information on the display unit 12.
Thereby, the electronic device 1a according to the present embodiment can display an image on the display unit 12 by specifying the display hierarchy, and therefore can perform flexible display with a higher degree of freedom.

[Third embodiment]
Next, a production management system 100 using the above-described electronic device 1 (1a) will be described as a third embodiment with reference to the drawings.

FIG. 13 is a block diagram showing an example of the production management system 100 according to this embodiment.
As shown in FIG. 13, the production management system 100 includes an electronic device 1 (1a), a plurality of reader/writers 2 (2-1, 2-2, 2-3, . . . ), and a management device 3. Be prepared.

Since the electronic device 1 (1a) has the same configuration as described in the first or second embodiment described above, the description thereof will be omitted here. The electronic device 1 (1a) displays, for example, on the display unit 12, control sheets and process sheets that include lot information, product codes, number of products in progress, number of non-defective products/defective products, etc. of various products managed by the production management system 100. This is an IFID tag for display, and is attached to shipping boxes 4 for transporting various products and parts. The electronic device 1 (1a) may display, for example, a two-dimensional code such as a barcode or a QR code (registered trademark) for production management on the display unit 12.

The shipping box 4 is, for example, a returnable box in which a product is placed and transported through each production process (for example, production process PS1 to production process PS3) at the production site.
Note that in the example shown in FIG. 13, one set of electronic devices 1 (1a) and a shipping box 4 are shown for convenience of explanation, but the production management system 100 shows multiple sets of electronic devices 1 (1a) and the mailbox 4 may be managed.

The reader/writer 2 (an example of a host device) has the same configuration as that described in the first embodiment, so the description thereof will be omitted here. Note that each of the reader/writer 2-1, reader/writer 2-2, reader/writer 2-3, etc. has the same configuration, and when referring to any reader/writer included in the production management system 100, or when specifically distinguishing If not, it will be explained as reader/writer 2.

The reader/writer 2 is arranged for each production process (an example of a process), and when the electronic device 1 (1a) passes through the production process, it transmits a display command and changes the display on the display unit 12 according to the production process. make it change Here, in the example shown in FIG. 13, the reader/writer 2-1 is placed in the production process PS1, and the reader/writer 2-2 is placed in the production process PS2. Further, the reader/writer 2-3 is placed in the production process PS3.
Production process PS1 to production process PS3 are, for example, processes such as product manufacturing, inspection, storage, and shipping.

The management device 3 controls the plurality of readers/writers 2 to manage the entire production management system 100. The management device 3 changes the display section 12 of the electronic device 1 (1a) via the reader/writer 2 according to the contents, results, etc. of each production process, and also changes the display section 12 of the electronic device 1 (1a) according to the contents, results, etc. of each production process. For example, products, parts, etc. placed in the box 4 are managed.

As described above, the production management system 100 (an example of a management system) according to the present embodiment includes the above-described electronic device 1 (1a) and a plurality of reader/writers 2 (reader/writer devices). The reader/writer 2 is a host device that is arranged for each process and changes the display on the display unit 12 according to the process by transmitting a display command (display request) when the electronic device 1 (1a) passes through the process. It is.
As a result, in the production management system 100 according to the present embodiment, the electronic device 1 (1a) can reduce the amount of information for storing image data and reduce the restrictions on images that can be displayed, so that the electronic device 1 (1a) can efficiently You can manage the process.

For example, when changing the display of a large number of electronic devices 1 (1a) in the production process, from the reader/writer 2 to each electronic device 1 (1a), from the viewpoint of communication traffic occupancy, communication cost, management, etc. It is necessary to keep the amount of information transmitted and the amount of information stored in each electronic device 1 (1a) as small as possible. In the production management system 100 according to the present embodiment, even in such a case, the amount of information transmitted from the reader/writer 2 and the amount of information stored in each electronic device 1 (1a) can be reduced, so that the process can be efficiently carried out. can be managed.

Further, for example, if the production site is a clean room or the like, it may not be possible to use normal paper control forms or process forms due to the generation of dust. On the other hand, in the production management system 100 according to the present embodiment, by using the electronic device 1 (1a) instead of paper control sheets and process sheets, dust generation can be suppressed, and paper-based printing and management can be controlled. You can save time and manage the process efficiently.

Note that the present invention is not limited to the above-described embodiments, and can be modified without departing from the spirit of the present invention.
For example, in each of the above embodiments, the electronic device 1 (1a) is an RFID tag, a contactless IC card, an edge device, etc.; however, the electronic device 1 (1a) is not limited to this, and wireless communication Other electronic devices such as IoT devices connected to an IoT (Internet of Things) network may also be used.

Further, in each of the above embodiments, an example has been described in which the electronic device 1 (1a) uses NFC as an example of wireless communication, but the present invention is not limited to this. The electronic device 1 (1a) uses other wireless communication such as Bluetooth (registered trademark), specific low power wireless communication such as LPWA (Low Power Wide Area), and wireless LAN (Local Area Network) instead of NFC. You may also use

Further, in each of the above embodiments, an example of using an image ID (image identifier) assigned to image data as an example of image specification information has been described, but the invention is not limited to this. The start address for storing image data in the section 131, the image name, the file name of the image, etc. may be used.

Furthermore, in each of the above embodiments, an example has been described in which the color information is associated with the display color shown in FIG. You can.
Furthermore, in the second embodiment described above, an example was explained in which the layer information is associated with the display hierarchy shown in FIG. Correspondence may also be used.

Furthermore, in the second embodiment described above, an example was explained in which layer information and color information are specified as 1-byte additional information, but the invention is not limited to this. For example, layer information and color information are each specified as 1-byte additional information. It may be specified as 1 byte of individual information.

Further, in the third embodiment described above, an example of the production management system 100 has been described as an example of the management system, but the present invention is not limited to this. The management system of the present invention may be suitable for other management systems such as, for example, an inventory management system or a logistics management system.

Note that each component included in the production management system 100 described above has a computer system therein. Then, a program for realizing the functions of each component included in the production management system 100 described above is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed. Processing in each configuration included in the production management system 100 described above may be performed. Here, "reading a program recorded on a recording medium into a computer system and executing it" includes installing the program on the computer system. The "computer system" here includes hardware such as an OS and peripheral devices.
Further, a "computer system" may include a plurality of computer devices connected via a network including the Internet, a WAN, a LAN, a communication line such as a dedicated line, etc. Furthermore, the term "computer-readable recording medium" refers to portable media such as flexible disks, magneto-optical disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into computer systems. In this way, the recording medium storing the program may be a non-transitory recording medium such as a CD-ROM.

The recording medium also includes a recording medium provided internally or externally that can be accessed from the distribution server for distributing the program. Note that the program may be divided into a plurality of parts, each of which is downloaded at different timings, and then combined with each of the components provided in the production management system 100, or the distribution servers that distribute each of the divided programs may be different. Furthermore, a "computer-readable recording medium" refers to a storage medium that retains a program for a certain period of time, such as volatile memory (RAM) inside a computer system that serves as a server or client when a program is transmitted via a network. This shall also include things. Moreover, the above-mentioned program may be for realizing part of the above-mentioned functions. Furthermore, it may be a so-called difference file (difference program) that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

Further, some or all of the functions described above may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each of the above-mentioned functions may be implemented as an individual processor, or some or all of them may be integrated into a processor. Moreover, the method of circuit integration is not limited to LSI, but may be implemented using a dedicated circuit or a general-purpose processor. Further, if an integrated circuit technology that replaces LSI emerges due to advances in semiconductor technology, an integrated circuit based on this technology may be used.

1, 1a electronic device 2, 2-1, 2-2, 2-3 reader/writer 3 management device 4 box 11 wireless communication section 12 display section 13 storage section 14, 14a control section 100 production management system 131 image storage section 141 , 141a Command processing section 142, 142a Display control section PS1, PS2, PS3 Production process

Claims (3)

a display unit that has non-volatile memory and displays three or more colors;
an image storage unit that can be displayed on the display unit and stores image data representing one pixel as binary information;
a wireless communication unit that communicates with the host device via wireless communication;
The display request received by the wireless communication unit from the host device through the wireless communication includes image designation information specifying the image data stored in the image storage unit, and a color indicating a color corresponding to the binary information. the image data specified based on the image specification information from the image storage unit in response to a display request including information, the number of images, and display position information indicating a position where the image is to be displayed on the display unit. a processing unit that acquires and displays the acquired image data on the display unit in a color based on the color information;
The display request includes layer information indicating a hierarchy to be displayed with priority in the display of the display unit,
The electronic device is characterized in that the processing section displays the image data in the layer corresponding to the layer information of the display section in a color based on the color information. The electronic device according to claim 1;
a plurality of reader/writer devices that are arranged for each process and are the host devices that transmit the display request and change the display on the display unit according to the process when the electronic device passes through the process; A management system characterized by comprising: a display section that has a non-volatile memory property and displays a plurality of colors of three or more; an image storage section that can be displayed on the display section and stores image data representing one pixel as binary information; A display method for an electronic device comprising a wireless communication unit that communicates with a host device by wireless communication,
The display request received by the wireless communication unit from the host device through the wireless communication indicates image designation information specifying the image data stored in the image storage unit and a color corresponding to the binary information. a receiving step of receiving a display request including color information , the number of images, and display position information indicating a position where the image is to be displayed on the display unit from the higher-level device through the wireless communication;
In response to the display request received in the receiving step, the processing unit acquires the image data specified based on the image specification information from the image storage unit, and converts the acquired image data into the color information. a processing step of displaying the color on the display unit in a color based on
The display request includes layer information indicating a hierarchy to be displayed with priority in the display of the display unit,
In the processing step, the processing section displays the image data in the layer corresponding to the layer information of the display section in a color based on the color information.

Images